React vigorously with water. The most common ones are the alkali metals, metal hydrides, alkyl lithiums, and alkyl aluminums
University of Maine, Department of Chemistry, Glossary of Safety Terms and Acronyms, Orono, ME, USA 2009. http://www.business.govt.nz/worksafe/tools-resourc es/glossary-of-terms-and-acronyms/a-to-b, (ChemSfty - Amer) {503}